| 摘要 |
An authentication system is enhanced by prompting an individual to perform a randomly-selected challenge action. For example, the individual may be requested to move the device in a particular motion, after entering a username/password combination. The randomly-selected challenge action verifies the individual is located at the device, which prevents automated attacks to steal the individual's identity. The challenge action improves security by preventing attackers from spoofing an individual's authentication information. The enhanced authentication system may be used on mobile devices, such as mobile phones and laptop computers, to provide access to secure data, such as bank account information.
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